Added new tests that needs to be implemented.

src/main/java/hhn/temp/project/provider/SimpleDatabaseManager.java

@@ -2,11 +2,11 @@ package hhn.temp.project.provider;
 
 import hhn.temp.project.Task;
 import hhn.temp.project.TaskState;
-import jdk.jshell.spi.ExecutionControl;
 
-import java.io.IOException;
 import java.sql.*;
+import java.util.ArrayList;
 import java.util.Collection;
+import java.util.List;
 
 public class SimpleDatabaseManager<E> implements DatabaseManager<E> {
 
@@ -78,33 +78,42 @@ public class SimpleDatabaseManager<E> implements DatabaseManager<E> {
   }
 
   @Override
-  public E getObject(int id) throws SQLException {
+  public E getObject(int taskId) throws SQLException {
     String query = getQuery(QueryMode.SELECT);
     Task task = null;
 
-    try (PreparedStatement ps = connection.prepareStatement(query)) {
-      ps.setInt(1, id);
+    PreparedStatement ps = connection.prepareStatement(query);
+    ps.setInt(1, taskId);
 
-      ResultSet resultSet = ps.executeQuery();
+    ResultSet resultSet = ps.executeQuery();
 
-      if (resultSet.next()) {
+    if (resultSet.next()) {
 
-        task = new Task(
-                resultSet.getInt("taskid"),
-                resultSet.getInt("workerid"),
-                resultSet.getString("name"),
-                resultSet.getString("description")
-        );
-        task.setTaskState(intToTaskState(resultSet.getInt("taskstate")));
-      }
+      task = new Task(
+              resultSet.getInt("taskid"),
+              resultSet.getInt("workerid"),
+              resultSet.getString("name"),
+              resultSet.getString("description")
+      );
+      task.setTaskState(intToTaskState(resultSet.getInt("taskstate")));
     }
 
     return (E) task;
   }
 
   @Override
-  public void deleteObject(int id) throws SQLException {
-    throw new SQLException("Not implemented yet");
+  public void deleteObject(int taskId) throws SQLException {
+    String query = getQuery(QueryMode.DELETE);
+
+    try (PreparedStatement ps = connection.prepareStatement(query)) {
+      ps.setInt(1, taskId);
+      ps.executeUpdate();
+    }
+  }
+
+  @Override
+  public E updateObject(int taskId, E object) throws SQLException {
+    return null;
   }
 
   @Override